Summary

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A cabinet, or CAB, file is single file that holds a number of compressed files. During installation of an application, the compressed files are decompressed and copied to your computer. Cabinet files are efficient because they save space and time when distributing software. A cabinet file usually has the file extension .cab. Missing or corrupt files may prevent installations from completing. It may be necessary to replace missing or corrupt operating system files or InstallShield files by extracting them from a cabinet file.